public class DuoweiDemo01 {
    public static void main(String[] args) {
        int[][] b ={{1,2},{3,5},{7,8},{9,9}};
      //  System.out.println(b[1][1]);
        for (int i = 0; i <b.length ; i++) {
            for (int j = 0; j <b[i].length ; j++) {
                System.out.println(b[i][j]);

            }
        }
    }
}
